From May 22 to May 23, 2026, the price of the '27°C or below' option plummeted from 24c to around 6c, and the '28°C' price fell from 27c to about 15c. Meanwhile, the '29°C' option rose from 19.5c to 30.5c, and the '31°C' option surged from 9.5c to 23c before retracing. The reason is that as the target date approaches, meteorological forecast models gradually ruled out the possibility of lower temperatures, narrowing the forecast range precisely to around 29°C-30°C, causing funds to quickly reallocate among adjacent options.

Predicting the daily high temperature for a specific city is a common engagement-driven topic in prediction markets. While it's not a major macro event the general public naturally ponders, it is a relatively standard liquidity-filler question within the prediction market ecosystem, keeping it from being extremely bizarre.

2026-05-22 to 2026-05-23, the price of the '31°C or higher' option plummeted from 40.5c to 3.95c, as updated weather forecasts closer to the date confirmed precipitation and ruled out extreme high temperatures. 2026-05-22 to 2026-05-23, the prices of the '27°C' and '28°C' options surged from 6c and 21.5c to 23c and 39.5c respectively, because the latest meteorological data narrowed the expected high temperature for May 24 down to the 27°C-28°C range.

The title mentions 'Denver', but the resolution specifically uses data from the Buckley Space Force Base (KBKF) in Aurora. Traders checking forecasts for downtown Denver or Denver International Airport (KDEN) might be misled, representing a classic geographic trap.

While weather derivatives exist in professional finance, predicting the exact highest temperature of a specific city on a single day remains a relatively niche and fine-grained topic for general prediction market participants. The general public does not usually try to guess such specific figures in their daily lives.

Between 05:13 and 08:53 on May 22, 2026, the price of the 30°C option plummeted from 34.5c to 15.5c, as updated forecasts closer to the date indicated higher temperatures, ruling out lower temperature possibilities. Between 16:08 and 19:33 on May 22, 2026, the price of the 31°C option surged from 26c to 40.5c, driven by adjusted weather forecasts that increased the likelihood of hitting 31°C or 32°C.

May 22, 2026 - May 23, 2026: The prices for the 34°C and 35°C options experienced sharp declines. The 34°C option plummeted from 13.5c to 1.3c, and the 35°C option crashed from 13c to 0.8c. The reason is that as May 24 approaches, weather forecasting models have become more precise, eliminating the possibility of anomalous extreme heat, causing the market to price these extreme high-temperature options near zero. Over the last 3 days, option prices excluding extreme highs have remained relatively stable, reflecting no significant changes in the short-term weather forecast.